Description for Extruder Gear1.Fit For Artillery Sidewinder X1 extruder gear, with 66 teeth, which are treated without any burrs, which can engage the filament smoothly and quitely.2.This extruder gear is made of plastic(POM) and stainless material, which is widely used in the industrial field, strong enough for feeding filament.Description fit for Artillery Sidewinder X1 Extruder Idler Arm1. Black and Silver are available2. Made of alluminum, much better than the plastic one3. With smooth bearing, ensure the feeding performancePacking ListThere are black and silver sets for optional:Black Sets1x Black extruder ilder arm1x Extruder gearSilver Sets1x Silver extruder ilder arm1x Extruder gear